camunda引擎类以及引擎配置类下

流程引擎管理类获取集合演示

流程引擎插件原理分析及使用

手工创建流程引擎3种方式

标准版流程引擎类扩展思路

1 继承StandaloneProcessEngineConfiguration

public class GjfStandaloneProcessConfiguration extends StandaloneProcessEngineConfiguration {
    @Override
    protected void init() {
        System.out.println("###########GjfStandaloneProcessConfiguration init ###########");
        super.init();
    }
}

2 配置Bean

 <bean id="processEngineConfiguration2"
          class="com.gjf.chp_1.GjfStandaloneProcessConfiguration">
        <property name="jdbcUrl" value="jdbc:mysql://106.13.133.106:3306/camunda"/>
        <property name="jdbcDriver" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUsername" value="root"/>
        <property name="jdbcPassword" value="mysql2019"/>
        <property name="databaseSchemaUpdate" value="true"/>
        <property name="processEnginePlugins">
            <list>
                <bean id="gjfProcessEnginePlugins" class="com.gjf.chp_1.GjfProcessEnginePlugins"/>
            </list>
        </property>
    </bean>

Spring整合Camunda

    <bean id="dataSource" class="org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy">
        <property name="targetDataSource">
            <bean class="org.springframework.jdbc.datasource.SimpleDriverDataSource">
                <property name="url" value="jdbc:mysql://106.13.133.106:3306/camunda"/>
                <property name="driverClass" value="com.mysql.jdbc.Driver"/>
                <property name="username" value="root"/>
                <property name="password" value="mysql2019"/>
            </bean>
        </property>
    </bean>
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <bean id="processEngineConfiguration" class="org.camunda.bpm.engine.spring.SpringProcessEngineConfiguration">
        <property name="dataSource" ref="dataSource"></property>
        <property name="databaseSchemaUpdate" value="true"></property>
        <property name="historyLevel" value="HISTORY_LEVEL_AUDIT"></property>
        <property name="transactionManager" ref="transactionManager"></property>
    </bean>
    <bean id="processEngine" class="org.camunda.bpm.engine.spring.ProcessEngineFactoryBean">
        <property name="processEngineConfiguration" ref="processEngineConfiguration"/>
    </bean>
    <bean id="repositoryService" factory-bean="processEngineConfiguration" factory-method="getRepositoryService"/>
    <bean id="runtimeService" factory-bean="processEngineConfiguration" factory-method="getRuntimeService"/>

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

自动部署使用

    <bean id="processEngineConfiguration" class="org.camunda.bpm.engine.spring.SpringProcessEngineConfiguration">
        <property name="dataSource" ref="dataSource"></property>
        <property name="databaseSchemaUpdate" value="true"></property>
        <property name="historyLevel" value="HISTORY_LEVEL_AUDIT"></property>
        <property name="transactionManager" ref="transactionManager"></property>
<!--        自动部署-->
        <property name="deploymentResources" value="classpath*:*.bpmn"></property>
<!--        配置租户-->
        <property name="deploymentTenantId" value="A系统"></property>
      <!--        文档存在，不在部署-->
        <property name="deployChangedOnly" value="true"></property>
    </bean>

Spring风格流程引擎类扩展

继承SpringProcessEngineConfiguration

public class GjfSpringProcessEngineConfiguration extends SpringProcessEngineConfiguration {
    @Override
    protected void init() {
        System.out.println("########## GjfSpringProcessEngineConfiguration init 开始 ### ");
        super.init();
        System.out.println("########## GjfSpringProcessEngineConfiguration init 结束 ### ");
    }
}

配置Bean

  <bean id="processEngineConfiguration" 
        class="com.gjf.chp_1.spring.GjfSpringProcessEngineConfiguration">
    ...........

Camunda引擎数据库类型优化点

Q 不支持国产数据库

ProcessEngineConfigurationImpl 中数据库类型映射方法

  protected static Properties getDefaultDatabaseTypeMappings() {
    Properties databaseTypeMappings = new Properties();
    databaseTypeMappings.setProperty("H2", "h2");
    databaseTypeMappings.setProperty(MY_SQL_PRODUCT_NAME, "mysql");
    databaseTypeMappings.setProperty(MARIA_DB_PRODUCT_NAME, "mariadb");
    databaseTypeMappings.setProperty("Oracle", "oracle");
    databaseTypeMappings.setProperty("PostgreSQL", "postgres");
    databaseTypeMappings.setProperty("Microsoft SQL Server", "mssql");
    databaseTypeMappings.setProperty("DB2", "db2");
    databaseTypeMappings.setProperty("DB2", "db2");
    databaseTypeMappings.setProperty("DB2/NT", "db2");
    databaseTypeMappings.setProperty("DB2/NT64", "db2");
    databaseTypeMappings.setProperty("DB2 UDP", "db2");
    databaseTypeMappings.setProperty("DB2/LINUX", "db2");
    databaseTypeMappings.setProperty("DB2/LINUX390", "db2");
    databaseTypeMappings.setProperty("DB2/LINUXX8664", "db2");
    databaseTypeMappings.setProperty("DB2/LINUXZ64", "db2");
    databaseTypeMappings.setProperty("DB2/400 SQL", "db2");
    databaseTypeMappings.setProperty("DB2/6000", "db2");
    databaseTypeMappings.setProperty("DB2 UDB iSeries", "db2");
    databaseTypeMappings.setProperty("DB2/AIX64", "db2");
    databaseTypeMappings.setProperty("DB2/HPUX", "db2");
    databaseTypeMappings.setProperty("DB2/HP64", "db2");
    databaseTypeMappings.setProperty("DB2/SUN", "db2");
    databaseTypeMappings.setProperty("DB2/SUN64", "db2");
    databaseTypeMappings.setProperty("DB2/PTX", "db2");
    databaseTypeMappings.setProperty("DB2/2", "db2");
    return databaseTypeMappings;
  }